Sinister Diesel - CAT Converter

Improve the Look

Sinister Diesel’s has Cat Converters for your Powerstroke, Duramax, or Cummins diesel. Whether you prefer stainless or aluminized steel, 4” or 5” exhaust, we have exactly what you are looking for and carry top brands like Flo-Pro and MBRP.

Enhance the Performance

Upgrading your diesel truck’s stock exhaust with an aftermarket Cat Converter allows your Powerstroke, Duramax, or Cummins engine to breathe more efficiently leading to a drop in exhaust gas temperatures and a boost in horsepower and torque.

Deepen the Sound

Replacing your current Cat Converter with an aftermarket Cat Converter will help give you that smooth, deep resonant sound that every diesel truck owner desires.

Why Buy Your Cat Converter from Sinister?

We have a wide selection of Cat Converters to choose from, and each is backed by free, live technical support and our Sinister guarantee. So pick your converter and start enjoying everything that comes with a performance exhaust kit!